<template>
	<view>
    <my-search bgcolor="pink" innerText="搜索" @click="gotoSearch"></my-search>
	  <view class="scroll-view-container">
	        <!-- 左侧的滚动视图区域 -->
	        <scroll-view class="left-scroll-view" scroll-y :style="{height: wh + 'px'}">
	          <block v-for="(item, i) in cateList" :key="i">
              <view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChange(i)">{{item.cat_name}}</view>
            </block>
	        </scroll-view>
	        <!-- 右侧的滚动视图区域 -->
	        <scroll-view class="right-scroll-view" scroll-y :style="{height: wh + 'px'}" :scroll-top="scrollTop">
	          <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
	            <view class="cate-lv2-title">/ {{ item2.cat_name }} /</view>
              <view class="cate-lv3-list">
                <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
                 <image :src="item3.cat_icon"></image>
                 <text>{{item3.cat_name}}</text>
                </view>
              </view>
	          </view>
	        </scroll-view>
	      </view>
	</view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
    mixins: [badgeMix],
		data() {
			return {
				wh: 0,
        cateList: [],
        active: 0,
        cateLevel2: [],
        scrollTop: 0
			};
		},
    methods: {
      async getCateList() {
        const { data: res } = await uni.$http.get('/api/public/v1/categories')
        if (res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message
        this.cateLevel2 = res.message[0].children
       
      },
      activeChange(i) {
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },
      gotoGoodsList(item3) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
        })
      },
      gotoSearch() {
        // console.log('ok')
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    },
    onLoad() {
      const sysInfo = uni.getSystemInfoSync()
      console.log(sysInfo)
      this.wh = sysInfo.windowHeight - 50
      this.getCateList()
    }
	}
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;
  
    .left-scroll-view {
      width: 120px;
  
      .left-scroll-view-item {
        line-height: 60px;
        background-color: #f7f7f7;
        text-align: center;
        font-size: 12px;
        position: relative;
        
        &.active {
          background-color: #FFFFFF;
          
          &::before {
            content: '';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #c00000;
            position: absolute;
            top: 50%;
            left: 0;
            transform: translateY(-50%);
          }
        }
      }
    }
    .cate-lv2-title {
      font-size: 12px;
      font-weight: bold;
      text-align: center;
      padding: 15px 0;
    }
    .cate-lv3-list {
      display: flex;
      flex-wrap: wrap;
      .cate-lv3-item {
        width: 33.33%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        margin-bottom: 10px;
        image {
          width: 60px;
          height: 60px;
        }
        text {
          font-size: 12px;
        }
      }
    }
  }
</style>
